package org.example.utils;


import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.StrUtil;
import org.example.dto.UserDTO;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.web.servlet.HandlerInterceptor;

import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import java.util.Map;
import java.util.concurrent.TimeUnit;


public class RefreshTokenInterceptor implements HandlerInterceptor {
    private StringRedisTemplate stringRedisTemplate;
    public RefreshTokenInterceptor(StringRedisTemplate stringRedisTemplate)
    {
        this.stringRedisTemplate=stringRedisTemplate;
    }
    //@Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        // 1获取请求头中的token
        String token=request.getHeader("authorization");
        if(StrUtil.isBlank(token))
        {
            return true;
        }
        // 2基于token获取redis中的用户
        String key=RedisConstants.LOGIN_USER_KEY+token;
        Map<Object,Object> userMap=stringRedisTemplate.opsForHash().entries(key);

        //3判断用户是否存在
        if(userMap.isEmpty())
        {

            return true;

        }
        //5将查询到的hash数据转为UserDto对
        UserDTO userDTO = BeanUtil.fillBeanWithMap(userMap, new UserDTO(), false);
        //6存在保存用户信息到ThreadLocal
        UserHolder.saveUser(userDTO);
        //7刷新token有效期
        stringRedisTemplate.expire(key,RedisConstants.LOGIN_USER_TTL, TimeUnit.MINUTES);

        //8放行

        return true;
    }

    //@Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        UserHolder.removeUser();
    }
}
